package 面向对象中级.访问权限修饰符;

public class B {
    public static void main(String[] args) {
        A a = new A();
        System.out.println(a.n1);
        System.out.println(a.n2);
        System.out.println(a.n3);
        //System.out.println(a.n4);

        a.a1();
        a.a2();
        a.a3();
        //a.a4();
    }
}
